﻿<p>The distribution element <em>IfcDistributionFlowElement</em> defines occurrence elements of a distribution system that facilitate the distribution of energy or matter, such as air, water or power.</p>
    
<blockquote class="example">
EXAMPLE&nbsp; Examples of distribution flow elements are ducts, pipes, wires, fittings, and equipment.
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<blockquote class="history">
HISTORY&nbsp; New entity in IFC2.0.
</blockquote>

<blockquote class="change-ifc2x4">
IFC4 CHANGE&nbsp; Ports are now primarily defined using <em>IfcRelNests</em> to enable definition of ports at type definitions (both forward and backward compatible), provide a logical order, and reduce the number of relationship objects needed.  The relationship <em>IfcRelConnectsPortToElement</em> is still supported, however is now specific to dynamically connected ports.
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